1 /* 2 * Copyright (C) 2009 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 package android.webkit; 18 19 import android.content.Context; 20 import android.view.View; 21 import android.widget.AbsoluteLayout; 22 23 import java.util.ArrayList; 24 25 class ViewManager { 26 private final WebView mWebView; 27 private final ArrayList<ChildView> mChildren = new ArrayList<ChildView>(); 28 private boolean mHidden; 29 30 class ChildView { 31 int x; 32 int y; 33 int width; 34 int height; 35 View mView; // generic view to show 36 ChildView()37 ChildView() { 38 } 39 setBounds(int x, int y, int width, int height)40 void setBounds(int x, int y, int width, int height) { 41 this.x = x; 42 this.y = y; 43 this.width = width; 44 this.height = height; 45 } 46 attachView(int x, int y, int width, int height)47 void attachView(int x, int y, int width, int height) { 48 if (mView == null) { 49 return; 50 } 51 setBounds(x, y, width, height); 52 final AbsoluteLayout.LayoutParams lp = 53 new AbsoluteLayout.LayoutParams(ctvD(width), ctvD(height), 54 ctvX(x), ctvY(y)); 55 mWebView.mPrivateHandler.post(new Runnable() { 56 public void run() { 57 // This method may be called multiple times. If the view is 58 // already attached, just set the new LayoutParams, 59 // otherwise attach the view and add it to the list of 60 // children. 61 if (mView.getParent() != null) { 62 mView.setLayoutParams(lp); 63 } else { 64 attachViewOnUIThread(lp); 65 } 66 } 67 }); 68 } 69 attachViewOnUIThread(AbsoluteLayout.LayoutParams lp)70 void attachViewOnUIThread(AbsoluteLayout.LayoutParams lp) { 71 mWebView.addView(mView, lp); 72 mChildren.add(this); 73 } 74 removeView()75 void removeView() { 76 if (mView == null) { 77 return; 78 } 79 mWebView.mPrivateHandler.post(new Runnable() { 80 public void run() { 81 removeViewOnUIThread(); 82 } 83 }); 84 } 85 removeViewOnUIThread()86 void removeViewOnUIThread() { 87 mWebView.removeView(mView); 88 mChildren.remove(this); 89 } 90 } 91 ViewManager(WebView w)92 ViewManager(WebView w) { 93 mWebView = w; 94 } 95 createView()96 ChildView createView() { 97 return new ChildView(); 98 } 99 100 /** 101 * Shorthand for calling mWebView.contentToViewDimension. Used when 102 * obtaining a view dimension from a content dimension, whether it be in x 103 * or y. 104 */ ctvD(int val)105 private int ctvD(int val) { 106 return mWebView.contentToViewDimension(val); 107 } 108 109 /** 110 * Shorthand for calling mWebView.contentToViewX. Used when obtaining a 111 * view x coordinate from a content x coordinate. 112 */ ctvX(int val)113 private int ctvX(int val) { 114 return mWebView.contentToViewX(val); 115 } 116 117 /** 118 * Shorthand for calling mWebView.contentToViewY. Used when obtaining a 119 * view y coordinate from a content y coordinate. 120 */ ctvY(int val)121 private int ctvY(int val) { 122 return mWebView.contentToViewY(val); 123 } 124 scaleAll()125 void scaleAll() { 126 for (ChildView v : mChildren) { 127 View view = v.mView; 128 AbsoluteLayout.LayoutParams lp = 129 (AbsoluteLayout.LayoutParams) view.getLayoutParams(); 130 lp.width = ctvD(v.width); 131 lp.height = ctvD(v.height); 132 lp.x = ctvX(v.x); 133 lp.y = ctvY(v.y); 134 view.setLayoutParams(lp); 135 } 136 } 137 hideAll()138 void hideAll() { 139 if (mHidden) { 140 return; 141 } 142 for (ChildView v : mChildren) { 143 v.mView.setVisibility(View.GONE); 144 } 145 mHidden = true; 146 } 147 showAll()148 void showAll() { 149 if (!mHidden) { 150 return; 151 } 152 for (ChildView v : mChildren) { 153 v.mView.setVisibility(View.VISIBLE); 154 } 155 mHidden = false; 156 } 157 } 158